9398 - Lego Technic 4x4 Crawler

[z3_2drive]

I agree with this, the crawler I have currently only has 1 xl for both axles and it is similar to zblj's raptor, and it works like a charm:

[efferman]

do you think this would work as a diff with limmited slip?

101_9496 von efferman auf Flickr

[allanp]

do you think this would work as a diff with limmited slip?

101_9496 von efferman auf Flickr

It would work as a differencial momentarily up until the pins touch, then it will be completely locked, so yes it'll work just as long as you only intend to turn a small amount before turning back the other way. You could try this:

Edited July 9, 2012 by allanp

[efferman]

thanks for the hint, but if possible, i want a automatic system

[Alasdair Ryan]

If that is the case you would need to have some sort of rubber band to a diff which would turn a gear change leaver which would then switch the diff on/off.

[efferman]

your idea sounds like it would need much space and i dont think that it would fit in a 9398 replacement axle. and this is my goal

[Alasdair Ryan]

Probably.

[AVCampos]

These two TechnicBRICKs articles should help you:

http://technicbricks.blogspot.com/2009/02/tbs-techtips-20-limited-slip.html

http://technicbricks.blogspot.com/2009/03/tbs-techtips-22-torsen-differential.html

[efferman]

thanks, for the links. now i know again from where i have my idea

[Zerobricks]

I once madw an axle witf difflock, that when totally steered turned off lock, but when not steering turned difflock on.

[timslegos]

@Zblj

That is one ingenious solution! How well did it work in the model?

tim

[Zerobricks]

@Zblj

That is one ingenious solution! How well did it work in the model?

tim

Never used it, because no diff works fine for me Especially in reverse

[efferman]

very interresting idea, thanks for sharing

[DLuders]

ineterceptor posted this

about "Testing Crawler 9398 on TruckTrial circuit. Out of the box it works pretty nice. If differs were swapped with knobs, it would work even better." I see a LUGPol Truck Trial sign at the beginning of the video.

Edited July 9, 2012 by DLuders

[timslegos]

Seems like a pretty capable model. I think when i get the set I will make it only front steer and make the turning radius smaller.

tim

[davidmull]

ineterceptor posted this

about "Testing Crawler 9398 on TruckTrial circuit. Out of the box it works pretty nice. If differs were swapped with knobs, it would work even better." I see a LUGPol Truck Trial sign at the beginning of the video.

Cool video performs pretty well :) can't wait to get it, iv mounds of Tarmac outside my house I'll put it to the test :)

[Alasdair Ryan]

At 2:28 It seams to struggle,It might do with some more gearing down or mayby it was the bad driver........

Here in the scottish highland's we have nothing to drive it on...........

(Ok so we might then............)

Edited July 11, 2012 by Alasdair Ryan

[davidmull]

At 2:28 It seams to struggle,It might do with some more gearing down or mayby it was the bad driver........

Here in the scottish highland's we have nothing to drive it on...........

(Ok so we might then............)

It's funny I taught bad driver too :)

[Xan326]

I was reading about the differential locks on here, what about these?:

Torsen Style Limited Slip Differential

-or-

using bands and thin wheels

http://www.youtube.com/watch?v=JI8UNQBpXvI#!

I like the idea of using bands, its small and doesnt take much space as long as you have enough space between to set this up. I like the torsen, but it takes up too much space. Time for someone to think of something! Anyone want to try?

Edit- So after about 7 tries, I finally get it to work

Edited July 12, 2012 by Xan326

[DLuders]

@ Xan326: Here are the steps to insert that video:

1) Copy the URL of the YouTube video you want to insert here on Eurobricks. For this example here (so that you can see all of the characters), I have stripped off the http:// characters so that you can see the entire string (without it being shortened): www.youtube.com/watch?feature=player_embedded&v=JI8UNQBpXvI#!

2) Paste the URL into the "Insert Media" button (located at the right end of the menu group, at the top-center of your "Reply" box).

3) Remove all of the characters that do not follow this format (again, without the http:// in this example so that you can see all of the character string): www.youtube.com/watch?v=xxxxxxxxxxxxx . In this case, the character string will be www.youtube.com/watch?v=JI8UNQBpXvI#! .

The final resulting string will look like this http://www.youtube.com/watch?v=JI8UNQBpXvI#!

http://www.youtube.com/watch?v=JI8UNQBpXvI#!

[Xan326]

@DLuders

Thanks, I'll try that.

[davidmull]

@DLuders

Thanks, I'll try that.

Rubber band idea works quiet well :)

[rm8]

I want to tell you about the simplest way to make LSD.

It is not a construction, but simple imitation using non-lego material, little cheat:)

You don't need any additional space or details. Just take thin rubber ring with size equal to gear 12 tooth bevel and with a hole in the middle. Place this ring under the central 12tooth gear at differential. It will make additional friction when one wheel "on the air". More the size of the wheel - more friction you need.

Use it;)

Edited July 12, 2012 by rm8

[davidmull]

I want to tell you about the simplest way to make LSD.

It is not a construction, but simple imitation using non-lego material, little cheat:)

You don't need any additional space or details. Just take thin rubber ring with size equal to gear 12 tooth bevel and with a hole in the middle. Place this ring under the central 12tooth gear at differential. It will make additional friction when one wheel "on the air". More the size of the wheel - more friction you need.

Use it;)

How well does it work or will it leave strain on motors?

[timslegos]

Use it;)

Great idea! How well does it work in models? Does the differential still slip at all?

tim